/*
 * Copyright (c) 2024. The BifroMQ Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *    http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and limitations under the License.
 */

package com.baidu.bifromq.baseenv.benchmark;

import com.baidu.bifromq.baseenv.MemUsage;
import java.util.concurrent.TimeUnit;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.BenchmarkMode;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Mode;
import org.openjdk.jmh.annotations.OutputTimeUnit;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.runner.Runner;
import org.openjdk.jmh.runner.RunnerException;
import org.openjdk.jmh.runner.options.Options;
import org.openjdk.jmh.runner.options.OptionsBuilder;

@BenchmarkMode(Mode.AverageTime)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
@State(Scope.Thread)
public class MemUsageBenchmark {
    @Setup(Level.Trial)
    public void setUp() {
        // Initialize MemInfo if necessary
    }

    @Benchmark
    public double benchmarkNettyDirectMemUsage() {
        return MemUsage.local().nettyDirectMemoryUsage();
    }

    @Benchmark
    public double benchmarkHeapMemUsage() {
        return MemUsage.local().heapMemoryUsage();
    }

    public static void main(String[] args) throws RunnerException {
        Options opt = new OptionsBuilder()
            .include(MemUsageBenchmark.class.getSimpleName())
            .forks(1)
            .warmupIterations(5)
            .measurementIterations(5)
            .build();

        new Runner(opt).run();
    }
}
